package com.roger.tool.utils;

import java.math.BigDecimal;


/**
 * com.util.AmountUtils
 * @description  金额元分之间转换工具类
 * @author zcm0708@sina.com
 * @2012-2-7下午12:58:00
 */
public class FenAndYuanUtil {
	
	/**金额为分的格式 */
	public static final String CURRENCY_FEN_REGEX = "\\-?[0-9]+";
	
	/** 
	 * 将分为单位的转换为元并返回金额格式的字符串 （除100）
	 * 
	 * @param amount
	 * @return
	 * @throws Exception 
	 */
	public static String changeF2Y(Long amount) throws Exception{
		if(!amount.toString().matches(CURRENCY_FEN_REGEX)) {
			throw new Exception("金额格式有误");
		}
		
		int flag = 0;
		String amString = amount.toString();
		if(amString.charAt(0)=='-'){
			flag = 1;
			amString = amString.substring(1);
		}
		StringBuffer result = new StringBuffer();
		if(amString.length()==1){
			result.append("0.0").append(amString);
		}else if(amString.length() == 2){
			result.append("0.").append(amString);
		}else{
			String intString = amString.substring(0,amString.length()-2);
			for(int i=1; i<=intString.length();i++){
				if( (i-1)%3 == 0 && i !=1){
					result.append(",");
				}
				result.append(intString.substring(intString.length()-i,intString.length()-i+1));
			}
			result.reverse().append(".").append(amString.substring(amString.length()-2));
		}
		if(flag == 1){
			return "-"+result.toString();
		}else{
			return result.toString();
		}
	}
	
	/**
	 * 将分为单位的转换为元 （除100）
	 * 
	 * @param amount
	 * @return
	 * @throws Exception 
	 */
	public static String changeF2Y(String amount) throws Exception{
		if(!amount.matches(CURRENCY_FEN_REGEX)) {
			throw new Exception("金额格式有误");
		}
		return BigDecimal.valueOf(Long.valueOf(amount)).divide(new BigDecimal(100)).toString();
	}
	
	/** 
	 * 将元为单位的转换为分 （乘100）
	 * 
	 * @param amount
	 * @return
	 */
	public static String changeY2F(Long amount){
		return BigDecimal.valueOf(amount).multiply(new BigDecimal(100)).toString();
	}
	
	/** 
	 * 将元为单位的转换为分 替换小数点，支持以逗号区分的金额
	 * 
	 * @param amount
	 * @return
	 */
	public static String changeY2F(String amount){
		String currency =  amount.replaceAll("\\$|\\￥|\\,", "");  //处理包含, ￥ 或者$的金额
		int index = currency.indexOf(".");
		int length = currency.length();
		Long amLong = 0l;
		if(index == -1){
			amLong = Long.valueOf(currency+"00");
		}else if(length - index >= 3){
			amLong = Long.valueOf((currency.substring(0, index+3)).replace(".", ""));
		}else if(length - index == 2){
			amLong = Long.valueOf((currency.substring(0, index+2)).replace(".", "")+0);
		}else{
			amLong = Long.valueOf((currency.substring(0, index+1)).replace(".", "")+"00");
		}
		return amLong.toString();
	}
	
//	public static void main(String[] args) {
//		try {
//			System.out.println("结果："+changeF2Y("-000a00"));
//		} catch(Exception e){
//			System.out.println("----------->>>"+e.getMessage());
////			return e.getErrorCode();
//		} 
////		System.out.println("结果："+changeY2F("1.00000000001E10"));
//		
//		System.out.println(AmountUtils.changeY2F("1000000000000000"));
//		System.out.println(Long.parseLong(AmountUtils.changeY2F("1000000000000000")));
//		System.out.println(Integer.parseInt(AmountUtils.changeY2F("10000000")));
//		System.out.println(Integer.MIN_VALUE);
//		long a = 0;
//		System.out.println(a);
//		
//	}

}

